Three-circuit-tuner bracket



Jan. 8, 1929.

R. H. VALENTINE THREE-CIRCUIT TUNER BRACKET Filed Oct. 31, 1925 INVENTOR.

wfimm WM 6nd 71 BY 2.

ATTORNEXE.

Patented Jan. 8, 1929.

UNITED STATES PATENT OFFICE.

ROLLO HOMER VALENTINE, OF SYRINGFIELD, ILLINOIS, ASSIGNOR OF ONE-FOURTH TO DIO CHALMERS FLEMING, 0F PEOR-IA, ILLINOIS.

f THREE-CIRCUIT-TUNER BRACKET.

Application filed October 31, 1925.

This invention relates to a class of tuners and oscillators that are adapted to be used in connection with radio apparatus and the like. 1

A particular purpose of this invention is to provide a three circuit tuner and superheterodyne oscillator that will provide means whereby a number of adjustments may be made inthe space relation and the consequent inductive relation of the respective inductance coils forming a part thereof.

A further purpose of this invention is to provide a decidedly neat and economically manufactured three circuit tuner and superheterodyne oscillator whose coils are adapted to be quickly and easily detachable from their mountings and subject to a minimum capacity effect whenthe circuit is being tuned by the operator.

A further purpose of my invention is to provide a device of the character described herein that will make it possible to more effectively tune in long distance radio stations and avoid local interferences to a minimum.

I attain the objects of my invention by the device described in detail in the annexed specifications recited in the claims and illustrated in the accompanying drawings; in which like reference numerals refer to the same structural parts in the several figures.

Referring to the figures: Figure 1 is a top or plan view of the device of my invention shown with inductance coils mounted thereon. Y I Figure 2. is a side elevation of my invention showing inductance coils mounted in operative position. In position shown in this figure the 'tickler coil is shown in position for securing a maximum of regeneration.

Figure is a vertical section through the center of the device ofmy invention showing thelmethod of mounting the same on a panel.

Figure 4. is a top view of one of the coils showing the design of the coil used which in this instance is preferably used as the tickler coil.

Figure 5. is a perspective of the stationary mounting bracket comprising part of the device of my invention and adapted to be Serial No. 65,922.

mounted in the position shown in Figure 2, and indicated by numerals -1- and 3-.

Figure (3. is a perspective of the rotatable mounting bracket for the tickler coil.

Figure 7. is a perspective of the threaded tubular sleeve mounting for the tuner of my invention and adapted to be attached securely through the panel of a radio receivmg set or sending set and provide substantial support for the stationary mounting bracket for the primary and secondary coils well as to provide a pivotal support for the rotatable mounting bracket supporting the tickler coil.

Figure 8. is a perspective of the insulation shaft support for the rotatable mounting bracket. i i

It will be evident to those skilled in the art of making radio apparatus that a device of this class should be subject to adjustments in several different ways in order to se ure a maximum of benefit from the tuning devices and it has certainly been observed by those interested in the details of radio apparatus designs that, many previous attempts have been made to provide a tuner that would be subject to various adjustments in the space relation of tuning coils.

For instance methods of mounting tuning coils have varied in different devices most of which have resulted in an awkward and poorly designed piece of apparatus which were also narrowly limited to the extent of the adjustment of coils in varying the tun mg.

. In the following paragraphs I will explain how the tuner of my invention accomplishes the intended result and secures the purposes for which it is designed which is to obtain a maximum of adjustments in space relation with the coils as well as a maximum of adjustments in the pivotally rotatable tickler coil used in cooperative relation with the primary and secondary coils.

First of all I provide a threaded tubular sleeve 5 which is mounted on the panel 6 and secured thereto by nut -7 after which nut 9 is tightened up against panel -6 for holding the tubular sleeve substantially in position on the panel.

After the tubular sleeve is substantially mounted bracket l is mounted thereon and secured in place by nut 1O This bracket has a supporting arm for inductance coils which arm is adapted to be normally disposed at an angle of about degrees.

through the threaded tubular sleeve '5 and it is to the end of this shaft that the rotatable bracket mounting for the tickler coil is substantially secured by a screw After the shaft of insulation material is secured within the sleeve (which sleeve has a cross section slot cut half way through it) a pin stop member 12 is substantially secured Within a hole in the shaft of insulation material and there adapted to rotate with said shaft within said slot in the tubular sleeve so as to provide stop means for limiting the r0- tatable movement of said shaft in making pivotal tuning adjustments of the tickler coil adapted to be slidably mounted on the angularly disposed supporting arm 4 of said rotatable bracket.

It will be seen that after the tubular sleeve and brackets have been suitably mounted in their operative position that the turning dial -14. may then be mounted on. the oppo site side of the panel to the opposite end of the rotatable shaft of insulation material.

When the several parts are thus mounted the tuner of my invention is ready formounting inductance coils thereon.

After the tuner brackets of my invention have been prepared for the coils the operator will slidably mount t-ickl'er coil 17- on supporting arm tof bracket 2 and then fasten the two flexible connections 20 and 2l of the tickler coil 17 to binding posts 18- and 19 respec tively from which the desired leads are taken.

It will be noted in connection with mounting the tickler coil that there is a distinct advantage in having this coil slidably adjustable on its mounting bracket l. It will be evident to those who are experienced in working with radio apparatus that such a slidable, adjustment of the tickler coil makes possible a greater variation in the tuning ef fects secured in the normal operation of this coil. 7

he operator will then mount secondary coil 16- slidably upon the slide arm -3 of the stationary bracket 1-. This coil it will be observed, may be optionally set in any desired position of slidable support on its supporting arm and wnen it is desired. to change that position the only thing that is re quired to move it is to slide it slightly on the support arm. I v

The primary coil -15- may then be mounted in the same manner that the secondary coil 16 is mounted and slidably adjusted optionally to a suitable space relation with the secondary coil where it is mounted on the same arm with it.

To those skilled inthe radio art it will be readily observed that with the combined merits of tne details of the structure of the tuner of my invention one is able to secure almost an unlimited variety of adjustments for securing tuning effects and it is thus observed that because of this fact and because of the novelty of its mounting facilities fortuning coils'my device is a very practical tuner for any one of the many tuning circuits now known to the art.

Forinstance it will secure the best possible results as a loose coupler for single circuits, a three circuit tuner, a super-heterodyne oseilla tor, or tuned radio frequency transformer.

Mounting brackets 1 and 2 are adapted to be made of any one of several suitable substantial insulation materials and preferably a material that would work up into such shapes economically in the process of manufacture.

To those skilled in the art to which this device pertains, it will be evident that slight changes may be made in the details of structure of the bracket or the threaded sleeve of my device and still stay within the spirit and scope of my invention, butthe preferred structure has been illustrated in the drawing and described the above paragraphs.

Having tl us described the nature of my invention what I claim is:

1. A coil mounting comprising a sleeve having means for mounting on a panel, a'shaft rotatable within said sleeve, a bracket fixed upon said sleeve and comprising oppositely extending portions, one at right angles to the sleeve and the other portion making an acute angle with the sleeve and constituting a coilsupporting arm, a coil-supporting arm fixed to the shaftand extending parallel to the arm of the first bracket, means for manually rotating said shaft and the arm carried there'- by and means for limiting such rotation to 180.

2. A coil mounting for the slidable and ad justable supportof tuning coils comprising in combination a sleeve having means for mounting on a panel, a shaft rotatable within said sleeve, a pair of coil mounting brackets of unlike size, the larger bracket fixed upon said sleeve and the smaller rotatably supported thereby, said larger bracket comprising oppositely extending portions, one at right angles to the sleeve and the other portion making an acute angle with the sleeve and constituting a coil supporting arm, the

smaller coil supporting bracket fixed to said shaft and extending-parallel to the arm of ROLLO HOMER VALENTINE. 

